shimmering and slight white edges

First I am not sure if this subject belongs here or compression. My apologies.
with encore I am authoring a blu-ray. I am almost done. I have 2 issues.
I have four very similar menus. Created in After effects, and then compressed with ame h.264 2 pass 18/35 then imported to encore. These menus have a zoom in on a still while the title over a blue sky zooms out.
The titles have a slight shimmering as it zooms out and a subtle slight/thin white edges while the prores 422 is fine. I do not know how to get rid of the shimmer and the white edges for the blu-ray. I have thickened the black outline, (originally had a glow, removed that too).

Hagop,
you should use NO transcoded material for your menus! encore is transcoding every menu of a blu-ray to MPEG2 itself. makes no difference if allready transcoded or not, or if your project-settings are H264 or MPEG2.

the menus allways will be transcoded as 23.98 MPEG2 - doesn´t matter if you are on a 1080i29.98 or 1080i25.

Thanks Danny, I just checked two ways. The encore project folder > Sources > Menus, all the menus are m4v, which as far as I know is H264. Then with 2 Sony Blu-ray players which have a display function, showing all the details, my movies as well as the menus are all AVC with matching audio at 448.
I am now imorting the 10 Menus as Premiere projects plus one movie and this is draining my computer's CPU and the project load time, so I can no longer edit menus in photoshop via encore (not enough memory). But in premiere I added blur to the menu videos and most of everything is resolved. If I do not do it this way and encode before importing I am getting red flashing frames in the first few seconds of each menu. So, encore is transcoding the menus but in H264 (m4v). all is 1080i 29.97